Hurricane Wilma was still gathering strength when the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite took this image at 11:55 a.m. Eastern Daylight Time, on October 18, 2005. At that time, Wilma was rapidly building in power and size. While lacking the classic, tightly wound spiral of a well-developed hurricane, Wilma was becoming a force to be reckoned with. Less than 24 hours later, Hurricane Wilma exploded in strength to the very top of the wind strength scale as a Category 5 hurricane. When this image was taken, Wilma’s sustained winds were 120 kilometers per hour (75 miles per hour). Just 18 hours later, they were 280 km/hr (175 mph)! At that point, Wilma became the most powerful storm in terms of both wind speeds and air pressure ever measured in an Atlantic hurricane.